Biomolecules PYQs Set 9 (PDF)

Set 9 of 11 · Questions 241-270 of 309

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Mere Teacher · Previous Year Questions NEET Chemistry · Biomolecules · Set 9 (Q241-270)
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241. $Hormone that maintains the blood glucose level within the limit is$ (1) $thyroxine$ (2) $insulin$ (3) $testosterone$ (4) $epinephrine$ 242. $Hydrolysis of nucleic acid gives nitrogenous base sugar and$ (1) $Sulphuric acid$ (2) $Phosphorous acid$ (3) $Sulphurous acid$ (4) $Phosphoric acid$ 243. $Identify non reducing sugar from following.$ (1) $Sucrose$ (2) $Maltose$ (3) $Lactose$ (4) $Glucose$ 244. $Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?$ (1) $a co- enzyme$ (2) $a hormone$ (3) $an enzyme$ (4) $an antibiotic$ 245. $The number of complementary hydrogen bond(s) between a guanine and cytosine pair is$ (1) $2$ (2) $1$ (3) $4$ (4) $3$ 246. $The total number of amino acids present in insulin is$ (1) $55$ (2) $1051$ (3) $51$ (4) $100$ 247. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : α -halocarboxylic acid on reaction with dil. N H_{3} gives good yield of a amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason (R) : Amino acids exist in zwitter ion form in aqueous medium. choose the correct answer from the options given below :$ (1) $Both (A) and (R) are correct and (R) is the correct explanation of (A).$ (2) $Both (A) and (R) arc correct but (R) is not the correct explanation of (A).$ (3) $(A) is correct but (R) is not correct.$ (4) $(A) is not correct but (R) is correct.$ 248. $If sucrose is boiled with dilute. HCl in alcoholic solution the ratio in which glucose and fructose are formed is$ (1) $1 : 1$ (2) $1 : 2$ (3) $2 : 1$ (4) $4 : 1$ 249. $Chargaff’s rule states that in an organism$ (1) $amount of adenine (a) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (c)$ (2) $amount of adenine (a) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (c)$ (3) $amount of adenine (a) is equal to that of cytosine (c) and the amount of thymine (T) is equal to that of guanine (G)$ (4) $amounts of all bases are equal.$ 250. $Observe the following statements. I. Sucrose has glycosidic linkage. II. Cellulose is present in both plants and animals. III. Lactose contains D-galactose and D-glucose units. Which of the following statements are correct?$ (1) $(I), (II) and (III)$ (2) $(I) and (II)$ (3) $(II) and (III)$ (4) $(I) and (III)$ 251. $The secondary structure of a protein refers to$ (1) $regular folding patterns of continuous portions of the polypeptide chain$ (2) $three‐dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain$ (3) $mainly denatured proteins and structures of prosthetic groups$ (4) $linear sequence of amino acid residues in the polypeptide chain.$ 252. $Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Amylose is insoluble in water. Reason R : Amylose is a long linear molecule with more than 200 glucose units. choose the correct answer from the options given below.$ (1) $Both A and R are correct and R is the correct explanation of A.$ (2) $Both A and R are correct and R is NOT the correct explanation of A.$ (3) $A is correct but R is not correct.$ (4) $A is not correct but R is correct.$ 253. $Identify the trisaccharide from following.$ (1) $Maltose$ (2) $Lactose$ (3) $Raffinose$ (4) $Stachyose$ 254. $Chemically considering digestion is basically$ (1) $anabolism$ (2) $hydrogenation$ (3) $hydrolysis$ (4) $dehydrogenation$ 255. $Which of the following statements about enzymes are true$ (1) $Enzymes catalyse chemical reactions by increasing the activation energy$ (2) $Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.$ (3) $Enzymes lack in nucleophilic groups.$ (4) $Pepsin is proteolytic enzyme.$ 256. $Which of the following is not a basic amino acid?$ (1) $Proline$ (2) $Lysine$ (3) $Arginine$ (4) $Histidine$ 257. $Which of the following molecules is eliminated during peptide bond formation?$ (1) $H_{2} O$ (2) $NH_{2}$ (3) $CH_{3} OH$ (4) $CO_{2}$ 258. $What are the functional groups present in the structure of maltose?$ (1) $One acetal and one ketal$ (2) $One ketal and one hemiketal$ (3) $Two acetals$ (4) $One acetal and one hemiacetal$ 259. $Maltose on treatment with dilute HCl gives :$ (1) $D-Glucose and D-Fructose$ (2) $D - Fructose$ (3) $D- Galactose$ (4) $D- Glucose$ 260. $The amino acid containing indole part is$ (1) $tryptophan$ (2) $tyrosine$ (3) $proline$ (4) $methionine$ 261. $Among the following compounds, which one is found RNA ?$ (1) (2) (3) (4) 262. $In which of the following amino acids - OH group is present?$ (1) $A, B$ (2) $A, C$ (3) $B, C$ (4) $B, D$ 263. $Which of the following is correct structure of α -anomer of maltose:$ (1) (2) (3) (4) 264. $The correct sequence of amino acids present in the tripeptide given below is :$ (1) $Val - Ser - Thr$ (2) $Thr - Ser - Val$ (3) $Leu - Ser - Val$ (4) $Thr - Ser - Leu$ 265. $Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.$ (1) $N H_{2} - C H_{2} - C O C l and N H_{2} - C H (C H_{3}) - C O O H$ (2) $N H_{2} - C H_{2} - C O C l and N \oplus H_{3} - C H (C H_{3}) - C O C l$ (3) $N H_{2} - C H_{2} - C O O H and N H_{2} - C H (C H_{3}) - C O O H$ (4) $N H_{2} - C H_{2} - C O O H and N H_{2} - C H (C H_{3}) - C O C l$ 266. $Match List-I with List-II List-I (A) Glucose + HI (B) Glucose + B r_{2} water (C) Glucose + acetic anhydride (D) Glucose + H N O_{3} List - II (I) Gluconic acid (II) Glucose pentacetate (III) Saccharic acid (IV) Hexane Choose the correct answer from the options given below$ (1) $(A)-(IV), (B)-(I), (C)-(II), (D)-(III)$ (2) $(A)-(IV), (B)-(III), (C)-(H), (D)-(I)$ (3) $(A)-(III), (B)-(I), (C)-(IV), (D)-(II)$ (4) $(A)-(I), (B)-(IH), (C)-(IV), (D)-(II)$ 267. $What is the functional group present in serine, an aminoacid in addition to - NH_{2} and - COOH groups?$ (1) $- OH$ (2) $- SH$ (3) $- NH -$ (4) $- C (= O) - N H_{2}$ 268. $The correct representation in six membered pyranose form for the following sugar [X] is$ (1) (2) (3) (4) 269. $The Fishcher presentation of D-glucose is given below. The correct structure(s) of β-L-glucopyranose is (are)$ (1) (2) (3) (4) 270. $The incorrect statements regarding enzymes are :(A) Enzymes are biocatalysts.(B) Enzymes are non-specific and can catalyse different kinds of reactions.(C) Most Enzymes are globular proteins.(D) Enzyme - oxidase catalyses the hydrolysis of maltose into glucose. Choose the correct answer from the option given below :$ (1) $(B), (C) and (D)$ (2) $(B) and (D)$ (3) $(A), (B) and (C)$ (4) $(B) and (C)$